docs: def get_klass_children(gi_name):
      '''
      Returns a dict of qualified symbols representing
      the children of the klass-like symbol named gi_name
      '''
      res = {}
      children = __HIERARCHY_GRAPH.successors(gi_name)
      for gi_name in children:
          ctype_name = ALL_GI_TYPES[gi_name]
          qs = QualifiedSymbol(type_tokens=[Link(None, ctype_name, ctype_name)])
          qs.add_extension_attribute ('gi-extension', 'type_desc',
                  SymbolTypeDesc([], gi_name, ctype_name, 0))
          res[ctype_name] = qs
      return res